Sprocket fastening



, July 5, 1932- KINDELMANN ETAL 1,366,112J` l sPRocxE'r FASTENING Filed oct. 31, 1929 2 Sheets-sheet 1 ATTORNEY July 5 193.2-` 4A. KINDELMANN E'r AL 1,866,112

sPRocxm FASTENING medocz. 51. 1929 z sheets-sheet 2 @f 9"" M 5 W,

ATTORNEY Patented JulyL 5, 1932` ALBERT KINDELMANN, or' FLORAL PARK, AND nWALn BOEGKING, 0F RRooxLYN. NEW

YoRir, AssiGNoRs 'ro INTERNATIONAL, rRoJrncroRcoRroRAIoN,or NRW YORK,

N. Y., A CORPORATEON OF DELAXVAR'E srRocKRT AstriiNiNd A.

Application nea october ai'.l -1e29'.se'1iaiNoi'4oa7e9. l

This invention relates to fastening devices, and more particularly to a me-ans for fastening an operating mechanism to a rotating shaft.

The invention is particularly applicable A further object is to provide a locking` mechanism by which the above elements may be positively secured.

Other 'and further objects will be apparent as the nature of the invention is disclosed.

A feature of the invention' is a frictional device carried by the shaft and adapted to be expanded into engagement with the hub of the member to be secured thereto.

Another feature is an expanding key carried by the shaft and adapted to be brought Y into frictional engagement with the internal surfaces of a. hub member.

The invention also consists in certain new and original features of construction and combinations of parts hereinafter set forth and claimed. y

Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto,- the invention itself, as to, its objects and advantages, the moclefof its operation and themanner of its organization may be better` understood by referring to the following description taken in connection with the accompanying drawings forming a part thereof, in which y 1 F ig.V 1 is a sectional view of the fastening means of the present invention appliedk to a sprocket;

Fig. 2 is a sectional view similar to Fig. 1l

showing the keys in engaging relationship;

Like reference characters denote like of Fig.Vl 1;

'I F igcafis v'asection takenfon the-line -of-Fig.z2;...". f* *.7 C Fig-"5 is a sectional-view of a modified form`v of the invention applied to a fly-wheel; Fig. 6 isa sectiontaken on the line 6-6 Vof Fig`.5';.- y f ,f 1

Fig.;;7"`isaa sectional view. ofV a modifiedu form` of the invention applied to a sprocket* for aiprojectionapparatus; andV Fig. Sis a section taken on the lineS-Sof` Fig.7.

inthe several'guresfof the drawings.j

ltaken `on the line 343 parts n f Infthe following description andwin the claims'partswill lbe identiedby-speciic names for convenience, but they are intended `to be' as genericV in their application to similar l' lPartsas the artwill-perini f L 70 :Referringtothe' drawings more in 'detail the; invention is shown: inFig. 1 asapplied to a; sprocket y1Ohaving a hub member :11 by whichj it` is secured to.; shaft. 412. ySaidr sprocket may be positioned against a shoulder 13 yof saidshaft iffd'esired.. Shaft12is 'progvifdedkwith an interior bore/14: in .which a member l-.havinga taperedpsurface 16 is threaded. Said shaft is also provided withM `1.apairof; slots which a vpair of keys 17 are B0 seiatedin engagementwith surface 16. y if -Longitudinal movement of member 15 `*causes tapered'surface 16Ito .exert a-wedg'ing force on keys 17 and thereby bring them into engagement with the inner surfaceof'hub 11 5 as vshown in Fig. 2. The frictional force is `idetermined bythe extent-of lmovement-k of threaded memberv n 15 which ymay be' suitably :ladjusted'to kpositively Llock the sprocket :10 y -xagainst movement Vvwithrespect to shaft 12. v Io-secure the eihcient operation of Athis gd'eviceit is1pre`ferableto provide hub 11 with a. bore of suitable size to forma comparatively tight fit on shaft12. The additional'force, 'l

then obtained bythe keys 17 ymay be used for '[95 positively -lockinggthe elements .in position.

Y- 'f EThe invention is shown in Fig.. 5y as applied l{to av devicey for llocking a I iyfwheel ontoAA the `shaft and .comprises a key 20which is carried 'onpshaft 21 and is .brought into engage- :ment with the hub 22 of ily-Wheel 23 by a threaded member 24 having a tapered cam surface 25. Member 24 is threaded in a suitable bore in shaft 21 and may be provided With a head 26 to facilitate'adjustment there- Said member :is `threaded internally of shaft 32 and is provided With arslot 36t0 .facilitate adjustment.. Key` 33 .is provided :with an extension 37 whichseatsin a. groove 38 in hub memberl31 for positivelyfsecuring the members in position. nailed .in a suitablebearing kin housing 40 rwhichgcarries an 'oil shield 41 terminating surface'of said hub, and an adjustable threadved member carried internally of said shaft for maintaining said key in frictional engagement with said hub.

l e .ALBERT KIl\lll)l]Ll\Al\Tl\T.

EWALD BGECKING.

Shaft32 is jouradjacent said sprocket. Oil threads 42 may be formedronsaid shaft forpreventingrcreepage of oil along the surface thereof.

,30 'It is/,to ibe noted that the fastening device described :above vprovides means "for readily .positioning fand jlocking an element lto a rotating shaft and contains no projecting parts .which .wouldjfinterfereA With the operation thereof. The expanded keys are capable of exerting sulicientfrictional forcefonthe hub :member to prevent relative movement `unless extreme forces areapplied. Alnany event'the keyvvay illustrated in Fig. T5 and the-position-V ingextension' illustrated in F ig. 7 forma pos-i- Y Y :tive lock. f Y

While certain novel-'featuresof the invention have been shownanddescribed and are pointedfout inthe annexedfclaims, it Willlbe understood' that :various omissions, substitu- :ti-ons. and changes inthe forms and details of the device illustrated and Yin its operation Vmaybe madeby those skilled in the art With- ;out departing :from lthe spirit of the inveny *Y What is claimed is.:

" 1; Incombina-tion with a sprocket,a shaft,

f `said Asprocket lhavinga hub in Vengagement With said shaft, Va key carried v.by saidfshaft and ladapted to contact'Wit-h said hub, said ey having a positioning extension adapted -toseat in a recess insaid hub, and atapered "member carried internally Vof Vsaid shaft for bringing -said key into 'frictional engagement with said hub. Y

2; In eombinationwith a sprocket, a shaft, said ksprocket'having a hub in :engagement `withl said fshaft,ja key carried by said :shaft andhaving a' positioning extension adapted zto seat :in fa recess in said hub land having a 5 surface adapted to Contact `With the inner 

